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C- J. BARRY.

BENDING AND FORMING MACHINE. APPLICATION min APR. m, 1911 l ,3Q5,99Q. Patented June 10, 1919.

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0.1. BARRY.

BENDING AND FORMING MACHINE.

APPLICATION FILED APR. 1a. 1917.

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cxact description of the same, reference CORNELIUS J. BARRY,

' ASSIGNMENTS, '10 FREDERICK J.

OF CHICAGO, ILLINOIS, ASSIGN OR, BY DIRECT MESNE SETCHELL, OF CHICAGO, ILLINOIS. 1

BENDING AND FORMING MACHINE.

To all whom it may concern:

Be it known that I, CORNELIUS J. BARRY, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook 5 and State of Illinois, have invented certain new and useful Improvements in Bending and Forming Machines; and I do hereby declare that the following is a full clear, agld ing had to-the accompanying drawings, and

to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to a machine adapted for making bends in rods, bars, tubes or Y similar stock or material, either in a hot or cold state, according to the properties of the material operated upon and permitting the bend to be formed'with mathematical exactness as to location, degree, and dimension,

and furthermore permitting the material to be bent into a number of diiferentpla'nesr 'T he machine is designed to accommodate the stock to be bent even though other than straight stock is introduced 1nto the machine ,,especially where a number of different bends are to be formed in a rod or bar with the bends at difierent angles and of different degree and disposed in difierent planes. Heretofore, bending of stock in such a manner has generally been performed by hand u-ponisuitable retaining or forming devices,

and the location, egree anidi mensions of the bend have been largely a matter of estimation rather than a problem wherein the predetermined With mathematical accuracy.

It is an object therefore of this invention to construct a machine for bending bars, rods, tubes or other similar material so that a number of different bends may be made in the material at a predetermined angle, the machine being provided with means whereby material to be bent may be readily adjusted for placing the material in the machine, so that the bend to be formed will bear a predetermined relation to other bent portions of the material.

Another object of the invention is to provide means for supporting the bending shoe whereby it is capable of a large amount of adjustment to enable the machine to operate upon stock of different sizes and also for the purpose of forming bends of different diameters, and in furtherance of the object, the adjustable bending means is provided with Specification of Letters Patent.

different requisites of the bend have been Patented June 10, 1919.

Application filed April 18, 1917f Serial No. 168,025.

interlocking portions whereby it is immovabl held in its adjusted position.

nother object is the provision of adjustable means for controlling the degree of bend, the sald means being placed above the surface of the table and adapted to en age the bending mechanism for regulating the operatlon thereof, the said parts being so placed so that they are conveniently accessible and ad ustable and so that their operation can be readily observed.

Qther and further important objects of, this invention will be evident from the disclosure in the drawings and specification.

The invention (in a preferred form) is lllustrated in'the drawings and hereinafter described.

On the drawings: 4 v

Figure 1 is a top plan view of a machine embodying the prlnciples of my invention. Fig. 2*isanend' viewthereofw if Fig. 3 is a detail section taken on line 33 of Fig. 1.

Fig. 4 is asectional detail taken on line 4-4 of Fig. 1, with parts omitted and parts shown in elevation.

Fig. 5 is a'to plan view of the driving worm wheel an worm meshin therewith.

Fig. 6 is a detail section taien on line '66 of Fig. 1.

Fig. 7 is a sectional detail taken on line 7'. of Fig. 1, with parts omitted and parts shown in elevation.

Fig. 8 is a detail plan view of the grooved forming block, and carrying plate.

As shown orrthe drawings The machine comprises a top plateor table 1, supported upon legs 2, and with a drive shaft 3, journaled beneath the table top 1, in bearings 4, secured therebeneath.

Attached upon the outer end of the drive shaft 3, as shown in Figs. 1 and 2, are tight and loose pulleys 5 and 6, respectively, around either one of which a shiftable belt may be trained in a usual and well known manner. Mounted vertically through the table top 1, near one end thereof, is a shaft 7, and journaled on the lower end thereof is a large worm wheel 8, meshing with a driving worm 9, secured upon the drive shaft 3. This worm wheel is held upon the shaft 7 by means of a collar 7 which is secured to the shaft by a pin 7 passed through the collar 7*, and shaft 7. Said worm wheel 8,

is provided with a plurality of upright lugs serrated, and a slotted adjustable plate 14,

" are secured in a-disk or the under surface of which is-complementally corrugated or serrated, is mounted thereon and is adapted to be clam ed in different adjusted positions by b0 ts 15, extending through the slots in said plate. The forward end of the plate or block (14, is recessed, as clearly shown in Fig. 8, and seated therein is a block 16, engaged upon an eccentric 17, which is secured uponv an upright bolt or shaft 18. Said bolt 18, is provided with a head formed on its lower'end' which is engaged in a T-slot 19, formed in the arm 13,- and with a crank or handle 20, secured upon the upper end of said bolt for rotational adjustments thereof. The forward end of said block 16, is grooved, as clearly shown in Fig. 7, and registers with a circular grooved wheel 21, which has the pins 22, passed therethrough and into a collar extension 23, formed on the shaft 7. Said pins plate 24, whichis held downwardly by a nut 25, threaded on the upper end of the shaft 7, and by detaching the nut and removing said disk 24, the stationary grooved member 21, may be de tached and another of different radius put in place thereof.

The tube, rod or bar 26, to be bent, is initially engaged between the block 16, and the stationary grooved member 21, as shown clearly in- Fig. 7. As shown in Figs. 1 and 7,

a portion of the upperedgeofthestationaryfltheastresspf its s rimv es 35, and shownin detail in Fig. ,3.v An indicator 33 is secured to the plate 14, by means of a set screw 15*, which has an indicator point above the bar 33. Graduations or markings may be provided on the bar.33,to facilitate accurate adjustment.

Rotatably mounted upon a clamping bolt 36, secured through the upturned end 35, of said bar, is a disk 37, with graduations on the periphery thereof and with a stationary pointer-.38, secured upon the upper end of the portion 35, to designate the position of adjustment of the disk. The outer Surface of said disk is diametrically grooved, and slidably mounted therein is a'shoe 39, having an angled end face. Said shoe and its angled end face is rotatably adjustable with said disk as well as slidably mounted thereon, and slotted so as to be held in clamped position by the axial clamping bolt 36, so that-it may be positioned to regulate the placing of bent pieces ofstock in order. that the desiredpredete'rifiined relation of the bend may be secured. A stationary slotted plate 40, is secured upon the'table top 1, adjacent to the initial position of the arm 13, and the plate 14, thereon and adjustably mounted in the slot in said plate 40, is a grooved wheel or sheave 41, adapted to be clamped in different adjusted positions by means of its axle bolt 42,- on said plate 40.

Mounted in the arm 12, as shown in detail in Fig.6, is a slidab'le pin43, whichextends downwardly through an arc-shaped slot 44, in the table 1, and bearing upon the upper end of said pin beneath a plug 45, is a coiled spring 46, which normally impels said pin downwardly into the position shown-inFig 4. A spring impelledmleteiit 47, is mounted in one side of the arm 12, adapted to engage a recess provided in said pin 43, to hold the same in an elevated position, as shown in Fig. 6, and said detent is retractable against grooved wheel 21, is cut away, as denoted by Said pin 43, as shown in Fig. 4, is provided the reference numeral 27, and this is to permit a tube or bar to project upwardly therewith a pin or shaft extension, with a roller 50, ournaled on the end thereof beyond the is mounted through in the event a bend is to 5 e mt endpf-theann l2,lird an adjustable stop 51,

in a cu I tions according to the graduations marked upon said rod, and the rear end of said rod is adjustably engaged through an eye 30,

upon a plate 31, which is held slidably adjustable upon the table 1, by a clamping bolt 32, engaged through a slot in said plate 31.

Slidably adjustable upon the block or plate 14, is a bar 33, held attached to said plate by bolts 34, engaging through a slot in said bar, and the outer end of said bar is turned up wardly, as denoted by the reference numeral shown in Fig. 1, provided with Hiifilined abutment 53, adapted to be contacted by said roller to elevate said pin upwardly from its position shown in Fig. 4, to its position shown in Fig. 6. A graduated scale 54, is formed or secured upon the table 1, concentric with the slot 52, to indicate the degree of adjustment of the stop 51.

The operation is as follows:

The stock 26, to be bent, is engaged upon the rod 28, with the end of the stock bearing against the stop 29, which is adjusted to a position predetermining the distance of the end of the stock from the bend to be made therein. The stock is engaged into the groove of the wheel 21, and the plate 14, is

d slotifl, of the table 1,

adjusted inwardly to bring the grooved block 16, closely adjacent the stock. The bolt or shaft 18, holding the block 16, is then rotated to thereby, due to the eccentric mounting of said block, shift said block tightly against the stock 26. The plate 14, disposed behind the block 16, is serrated on its under surface to engage with the serrations in the top surface of the arm 13, of the rotatable head 11, to positively lock the plate 14,"

against displacement when pressure 1s applied by the turning of the cam 17.

The grooved idler wheel 41, is also shifted forwardly into close relation with the stock.

26, to brace thesame. The stop 51, is shown in Fig. 1, as set to than 45 degrees although it may be set for any desired bend, and when the head 49, is pulled outwardly to release the pin 43, the pin is projected downwardly by its spring 46. The continually rotating worm wheel 8, will finally bring one of the dogs 10, into pow sition to contact the pin, such as shown in Fig. 4, and thereby cause the head 11, to ro tate around with the worm wheel so that the grooved block 16, bends the stock 26, around I the grooved wheel 21. Of course, .the plate 14, on the arm around therewith, and likewise the arm 12, moves until the roller 50, strikes the inclined abutment 53, which elevates the driving pin 43 from engagement with the lug 10, and. movement of the head 11, and its folding or bending block 16, then ceases. The parts may then be shifted by hand back to initial position, and the stock removed.

In the event that a bend already exists in the stock and it is desired to make another bend therein in a different plane than the existing bend, the outwardly projecting bent portion of the stock may be caused to rest against the plate 39, which may be adjusted to the correct angular position so as to hold the stock in position so that the desired bend may be made in the given piece of stock. That is, the desired angle of the plane of the new bend with reference to the plane of the bend already formed may be accurately secured by rotating the adjustable plate 39, and its disk 37, (the periphery of which is graduated and the angular position denoted by the pointer 38), and adjusting the plate 39, diametrically of the disk 37, so that it will properly engage the angular portion of the stock so that the bend to be formed will bear the desired relation to the said angular portion. Then it is only necessary to rotate the stock about the rod 28, on which it is engaged to bring the already bent portion fiat against the plate 39, and, of course, the bar 33, as well as the plate 14, may be both adjusted to bring the plate 39, into proper position for contact with the bent stock piece. If the new bend in the stock is to be directly adjacent a bend alafiord a bend slightly less 13, of the head 11, swings ready formed, the bent portion of the stock is disposed with its outwardly projecting end extending through the notch 27, of the stationary wheel 21.

The radius of the bend is determined by the size of the grooved wheel 21, and various grooved Wheels may be used interchangeably on the machine for different radii of bends desired. Of course, when the wheel 21, is changed, this necessitates a change in position of the anchoring rod 28, for the stock, and this rod may be shifted by shifting the slidable plate 31, and, of course, the bracing grooved wheel 41, is also shifted on its plate 40.

I am aware that" various details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. A machine for bending longitudinal pieces of stock comprising a form, means for holding the longitudinal piece of stock adjacent the form, a movable member for bending the longitudinal piece of stock about the form, and a gage adjustable in a plane transverse to the length of the piece of stock in its operative position, said gage being adapted to bear against an angular portion of the piece of stock for the purpose of causing the new bend to be made in a predetermined relation to the angular portion of the stock.

.2. A machine for bending longitudinal pieces of stock comprising a support, a form on the support, means for holding the longitudinal piece of stock adjacent the form, bending mechanism for bending the longi tudinal piece of stock about the form, a gage positioned laterally from the piece of stock in its operative position, said gage having a supporting part adapted to bear against a previously bent portion of the piece of V tock, means for adjusting the gage in a plane transversely to the length of the piece of stock, and means for adjusting the gage longitudinally of the piece of stock.

3. A. machine for bending longitudinal pieces of stock comprising a support, a form on the support, means for holding the longitudinal piece of stock adjacent the form, a pivoted member movable about the form for bending the longitudinal piece of stock thereabout, and a gage on the pivoted member positioned laterally from the longitudinal piece of stock, to provide a rest for angular portions of the stock.

4. A machine for bending longitudinal pieces of stock comprising a support, a form on the support, means for holding a longitudinal piece of stock adjacent the form, a member pivotally mounted upon the support for bending the longitudinal pieces of stock tions of the piece of stock, and means for adjusting the gage lengthwise of and in a plane transversely to the longitudinal piece of stock.

5. In a bending machine, the combination of a form, a bending member, a pivoted bending mechanism cooperating with said form, and having a part for supporting the bending member, a support for the bending member mounted on said part and adiustable to and from the form, said part and support being provided with matching ser- 5 rated faces for locking the support in adjusted positions, and means on the support 4 for adjusting the bending member relatively to the support to and from the form.

In testimony whereof I have hereunto 20 subscribed my name in the presence of two subscribing witnesses.

CORNELIUS J. BARRY.

Witnesses:

LE 1101* D. KILEY, p n. HARDINE. 

